BIO 201 Exam 1 Questions

Dr. P used an egg white to demonstrate which of the protein conformations? A) Primary conformation B) Secondary conformation C) Tertiary conformation D) Quaternary conformation E) none of the above

A) Primary conformation

Osmotic pressure is balanced by a force known as hydrostatic pressure (water pressure). A) True B) False

A) True

The sub-atomic particle responsible for the chemical behavior of atoms are: A) electrons B) ions C) neutrons D) protons E) a and b

A) electrons

Matching 13- 17 a) enzyme b) ribonucleic acid c) ribosome d) a catabolic reaction e) none of the above 13) A substance produced. through the process of protein synthesis

A) enzyme

Which of the following organelles is responsible for protein activation and packaging? A) the Golgi complex B) the ribosomes C) the mitochondria D) the nucleus E) none of the above

A) the Golgi complex

Anabolic respiration specifically refers to: A) the process where glucose is catabolized to pyruvate and lactate B) a chemical reaction that needs oxygen to continue C) artificial ventilation of a drowning victim D) two of the above E) none of the above

A) the process where glucose is catabolized to pyruvate and lactate

Amino acid monomers are removed from a polypeptide chain via a reaction that involves a molecule of water. Does this reaction use a water molecule or create one? A) the reaction USES a water molecule B) the reaction CREATES a water molecule

A) the reaction USES a water molecule

The head of the phospholipid molecule has a ________ charge and is therefore _______? A) positive; hydrophobic B) negative; hydrophilic C) positive; hydrophilic D) negative; hydrophilic

B and D) negative, hydrophilic

In the solid phase, water molecules undergo a change in density and therefore ice will float with - 10% of its mass above the surface of the liquid. So the ice indicated in Figure 1 will eventually change phase back to a liquid. When it. undergoes this change, what will the level of the new solution be in figure. 2? Level 1, 2, or 3? A) Level 1, there is more water when the ice melts B) Level 2, no change in the water level after the phase change C) Level 3, there will be less water in the glass

B) Level 2, no change in the water when the ice melts

This type of tissue has no corresponding cells that produce connective tissue extracellular matrix. Its own cells provide the structural support. A) Connective B) Nervous C) Muscle D) Epithelium

B) Nervous

Which of the following will decrease the rate of a chemical reaction? A) an increase in reactant concentration B) an increase in product concentration C) an increased temperature D) enzyme activation E) all of the above

B) an increase in product concentration

This anabolic reaction results in the formation of a polysaccharide: A) glycogenolysis B) glycogenesis C) hydrolysis D) glycolysis E) two of the above

B) glycogenesis

Which of the following are catabolic reactions? A) synthesis of ATP B) hydrolysis of a polypeptide C) gluconeogenesis D) glucogenesis E) all of the above are anabolic

B) hydrolysis of a polypeptide

Gasses move according to the laws of physics. Since this is true, where will the lowest concentration of O2 be located inside a cell? A) in the nucleus B) in the mitochondria C) in the Golgi apparatus D) in the cytosol E) it will be in equilibrium

B) in the mitochondria

A single molecule of water is "polar" because A) it has a positive and negative pole B) it shares hydrogens electrons unequally C) the two hydrogen atoms "bend" the molecule D) it has two negative poles E) all of the above

B) it shares hydrogen's electrons unequally

When two oxygen atoms are joined to a carbon atom, (atomic number 8 and 6 respectively) they form ________ bonds. A) hydrogen B) non polar covalent C) polar covalent D) ionic E) none of the above

B) non polar covalent

A pentose sugar is a part of the. monomer used to build which type of macromolecule? A) polysaccharides B) nucleic acids C) phosphorylated glucose D) glycogen E) polypeptide

B) nucleic acids

Matching 13- 17 a) enzyme b) ribonucleic acid c) ribosome d) a catabolic reaction e) none of the above 14) A single stranded assembly of nucleic acid

B) ribonucleic acid

A receptor protein in the plasma membrane will not bind to just any chemical in the extracellular fluid, but only to certain ones. This property is called _______. A) selectivity B) specificity C) efficacy D) saturation E) fidelity

B) specificity

The process of exocytosis requires: A) ATP synthesis B) the fusion of a lipophilic vesicle with a hydrophobic membrane C) glycogenesis D) two of the above E) all of the above

B) the fusion of a lipophilic vesicle with a hydrophobic membrane

What constitutes the active site of an enzyme? A) a substrate B) water C) a precise sequence of amino acids D) a sequence of nucleic acids E) none of the above

C) a precise sequence of amino acids

DNA is a polymer of ______, which consist of a sugar, a phosphate group, and a _______. A) amino acid, nucleotide B) nucleic acid, nucleotide C) nucleotide, nitrogenous base D) nucleotide, nucleic acid E) proteins, nucleotide

C) nucleotide, nitrogenous base

________ are the most abundant molecules in the plasma membrane. A) protein channels B) carbohydrates C) phospholipids D) cholesterol E) glycolipids

C) phospholipids

Which of the following are classes of organic molecules? A) water, carbon dioxide, and ions B) phospholipids, proteins, and water C) proteins, nucleic acids, and carbohydrates D) lipids, carbohydrates, and oxygen E) two of the above

C) proteins, nucleic acids, and carbohydrates

Matching 13- 17 a) enzyme b) ribonucleic acid c) ribosome d) a catabolic reaction e) none of the above 16) An organelle responsible for synthesizing an enzyme catalyst

C) ribosome

Matching 13- 17 a) enzyme b) ribonucleic acid c) ribosome d) a catabolic reaction e) none of the above 15) A phospholipid bound organelle

C) ribosome OR E) none of the above

ATP is hydrolyzed when _______ are moved from one side of the membrane to the other. A) glucose molecule B) lipids C) sodium ions (Na+) D) two of the above E) none of the above

C) sodium ions (Na+)

Which of the following organelles are involved in storage of a protein after it has been synthesized? A) ribosomes B) rough ER C) Golgi apparatus D) the nucleus E) all are involved

C) the Golgi apparatus

Metabolism is defined as: A) the rate at which you "burn" calories B) the minimum chemical reaction rate necessary to maintain life C) the sum total of all chemical reactions in the body D) two of the above E) all of the above

C) the sum total of all chemical reactions in the body

Cell A has a sodium (Na+) concentration of 2.0M, while cell B has a chloride (Cl-) concentration of 1.5M, and a glucose concentration of 1.0M. Which cell has the highest osmotic pressure, and which direction will water move through a semipermeable membrane? A) Cell A; from B to A B) Cell B; from B to A C) Cell A; from A to B D) Cell B; from A to B E) non of the above are correct

D) Cell B; from A to B

Complete the following reaction: ADP + P = A) dehydration synthesis of ADP B) hydrolysis of ATP C) hydrolysis of ADP D) dehydration synthesis of ATP E) none of the above

D) Dehydration synthesis of ATP

Which of the following are waste products of cellular metabolism? A) CO2 and H2O B) heat, H2O, and ATP C) NH2 and heat D) a and c E) all of the above

D) a and c

Which of the following is the best example of kinetic energy? A) a battery B) water behind a dam C) the bonds of C6H12O6 D) a wind mill used for grinding grain or pumping water E) some of the above

D) a wind mill used for grinding grain or pumping water

Water soluble substances move out of a capillary by the transport. process _________. A) simple diffusion B) facilitated diffusion C) exocytosis D) filtration E) active transport

D) filtration

If a reaction has a high activation energy, it may be overcome be A) adding energy from the hydrolysis of ATP B) increasing the temperature of the solution C) addition of a catalyst to the solution D) b and c E) all of the above

E) all of the above

What stops Na+ and Cl- from creating ionic bonds in the human cells? A) hydration spheres B) water C) inability of each ion to contact one another D) two of the above E) all of the above

E) all of the above

Which of the following are nucleotides or contain nucleotides? A) DNA B) RNA C) ATP D) a and b E) all of the above

E) all of the above

Which of the following statements is true? Metabolic pathways ________. A) occur in a precise, stepwise series of chemical reactions B) are controlled by enzymes activity C) can occur in either direction of the same metabolic pathway D) only a and b are true E) all of the above are true

E) all of the above are true

Which of the following DO NOT influence the rate of solute diffusion through a membrane? A) solute concentration B) membrane permeability C) molecular weight D) membrane surface area E) all of them influence the rate

E) all of them influence the rate

Matching 13- 17 a) enzyme b) ribonucleic acid c) ribosome d) a catabolic reaction e) none of the above 17) Glycogenesis

E) none of the above